I think your kitten just sounds as if he eats too much! No wonder he has a huge belly. Contrary to popular belief, worms do not cause animals or people to eat a lot, quite the contrary. Animals that have worms lose their appetite, often have diarhoea and may vomit. It's a good idea to get your kitten wormed initially anyway, just make sure he's not too young to do so. Keep a better eye on his diet and don't overfeed him or you'll end up with an obese, unhealthy cat.

A large worm burden of tapeworms will cause abdominal distension in a kitten, but as I have said, voracious appetites are less common in a tapeworm infestation, lack of appetite is more common. Threadworms are more likely to cause either a voracious apetite or a sporadic, irregular one. Another symptom of a tapeworm infection is anaemia (check if the kittens mucous membranes are pink and healthy looking or very pale). Indeed, as Luckyrescue pointed out, there are many species of worms, but an easy way to see if the kitten has tapeworms is to examine the faeces yourself. If present, the tapeworm segments appear like tiny grains of rice that appear to contract or move. (Be sure to wash your hands thouroughly after petting you kitten or examinig him as, if he does have tapeworms, many tapeworm eggs are infectious to humans). As I stated in my last post, take your kitten to be wormed as a matter of routine and your vet will be able to advise you.